284 PLANT LIFE OF ALABAMA. 



Geographical and ecological distribution of the lichens of Alabama. 



LIVERWORTS. 



With the exception of a small number contributed by the Biological 

 Survey of Alabama from the vicinity of Auburn (Metamorphic hills), the 

 greater part of these plants known from Alabama have been collected 

 in Mobile County. The northern part of the State, in regard to liver- 

 worts, is yet a field to be explored. Forty-eight species under 25 

 genera have at present come to our knowledge from this State, being 

 about two fifths of the species described in the sixth edition of Gray's 

 Manual. 



